My favorite is Cyb Lhia. At an 8 power she's a threat and with the low damage mixed with poison most players don't know if you're bluffing or not. If anything, recovering pillz makes it hard to lose when playing this card. Plus, overall I'm not sure how many players know how to handle the Vortex bonus yet.
Best way to handle the Vortex bonus? Mono Piranas with pill manipulation!
I can't get down with Cyb Lhia at all. I've been building a lot of Vortex decks lately, and C Wing and Neloe have been my two favourite 2* so far.
I do like Cyb's high power, but unless she's used early on (round 1-2) she's really not much of a threat, and that makes her kind of predictable.